| 摘要 |
The present invention relates to an inner rotor-type mold motor capable of preventing electrical erosion even when the inner rotor-type mold motor is PWM-controlled. According to the present invention, a stator is mold using a mold resin to form a case. On the inner circumference of the stator, a rotor is placed in a rotatable manner. the mold motor includes a rotational shaft; an upper bearing and a bottom bearing which support the upper part and the lower part of the rotational shaft in a rotatable manner, respectively; a printed circuit board which is placed on the stator and on which a ground pattern is formed; a upper bearing cap which surrounds the upper bearing; an elastic pressurizing unit which pushes the outer wheel of the upper bearing against the upper bearing cap; and a connection wire which electrically connects the upper bearing cap and the ground pattern. In the illustrated structure, at the center of the printed circuit board, a penetration hole which exposes the upper bearing cap is formed. The elastic pressurizing unit is a wave washer. |
